DERIVATIVE INSTRUMENTS: (Tables)
 6 Months Ended
May. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of fair value of foreign exchange forward contracts
The following table summarizes the fair value of the Company’s outstanding derivative instruments as of May 31, 2015 and November 30, 2014:
 
 
 
Fair Value as of
 
Balance Sheet Line Item
 
May 31, 2015

 
November 30, 2014

Derivative instruments not designated as hedging instruments
 
 
 
 
Foreign exchange forward contracts
 
 
 
 
 
Other current assets
 
$
2,057

 
$
4,532

 
Accrued liabilities
 
$
202

 
$
145

Derivative instruments designated as cash flow hedges
 
 
 
 
Interest rate swaps
 
 
 
 
 
Accrued liabilities
 
$
264

 
$
—

 
Long-term liabilities
 
$
1,623

 
$
—